Beating-engine.



B. BUEHLER.

BEATING ENGINE.

APPLICATION FILED JAN.22

Patented J 111 v ramzamlzc/z" UNITED sTATEs PATENT OFFICE.

BROWNELL IBUEHLER, 0F PHILADELPHIA, PENNSYLVANIA,

BEATING-ENGINE.

Specification of Letters Patent. 4

Patented July 2', 1918.

Application filed J'anuary22, 1918. I Serial No. 213,222.

withdrawing the stock as soon as it has been reduced to pulpwhose'pieces are of the required' size.-

It is further desired to provide a machine of the type noted with anovel form of per-, forated structure and outlet chamber for withdrawingthe pulp from the tank, the invention contemplating the perforation ofthe backfall and the. connection of the outlet pipe of the machine tothe inclosed space immediately under said part.

These objects and other advantageous ends I attain as hereinafter setforth, reference being had to the accompanying drawings, in which Figure1 is a longitudinal vertical section of a beating. engine including myinvention,

Fig. 2 is a plan of the machine shown in Fig. 1, and

Fig. 3 is a perspective of the backfall.

In the above drawings, 1 represents the tank of a beating engine of theordinary construction, having rotatably mounted between its centralpartition 2 and one of its sides, a beating roll 3 carried on a shaft 4supported in suitable bearings 5 and 6. Fixed to the shaft 4' is adriving pulley 4 which, under operating conditions, is driven from anysuitable source of power.

The roll or drum 3 has projecting from its surface blades or knives 7designed to co-act with a fixed member 8 supported in the customarymanner at the bottom of the tank by a frame 9 and a backfall 10 extendsupwardly adjacent to but at an increasing distance from the surface ofthe roll, having its upper outer end carried to a heightslightly belowthe level of the center line of said roll, from whence it extends backand downwardlyat an angle of about 45 to the bottom of the tank.

As indicated, the outlet pipe 12 leading to any desired receptacle suchas a stufi chest, is connected to the space defined by back fall 10, thedownwardly extended cover portion 11 thereof and the bottom of the tankimmediately under these parts, and there are perforations 13 formedthrough the backfall into the chamber 14. These openln gs are of thedimensions necessary to separate stock which has been reduced to piecesof pre-determined size and forms a pulp, from the larger pieces ofstock.

Under operating conditions, rotation .of the beating roll 3 in thedirection of the arrow a Fig. 1, causes a circulation of water and stockin the tank in the direction of the arrow 5,-the valve 15 in the pipe 12being opened sufliciently to permit of a flow of pulp from the space 14under the backfall at the desired rate to the stuff chest or otherreceptacle' Owing to the 'co-action of the blades on the roll with thefixed member 8, the stock is reduced to pulp and asthis is formed thegreater portion of it is continu-' ously removed from the tank bypassing through the perforations 13 in the backfall,

it being noted that the stoppage of said perforations by larger piecesof stock iseffectually prevented by the washing actionv of the liquidcurrent passing at relatively high velocity over the concave face of.said backfall or equivalent structure.

By reason of the above described arrangement and operation of the parts,I am enabled to utilize what is ordinarily 'a waste space in the beatingengine, to wit,that space under the backfall 10 and inclined" cover 11.

. It is to be understood that while for purposes of illustration I haveshown my invention as applied to a machine technically known as abeating engine, it may without material alteration be employed inapparatus such as washing machines in which the roll is utilized forpurposes of circulation or agitation of the stock either with or withoutthe fixed member or bed plate 8.

I claim:'

1. The combination in a beating engine of a tank; a circulating roll; abackfall mounted in the tank adjacent said roll and having perforationstherein of a size to permit passage of pulp; and means for withdrawingfrom'the tank the pulp passing through the perforations of saidbackfall.

2. The combination in a beating engine of a tank; a eating rol herein hi g lad a fixed member mounted in the tank to cooperate with the bladesof said roll; a concave backfall extending upwardly adjacent the rollfrom a position near the fixed blades 5 and having perforations thereinof a size to permit passage of pulp; an extension cooperating with thebottom of the tank and

